vestment

noun

1. a garment, especially an outer garment.
2. vestments, Chiefly Literary. attire; clothing.
3. an official or ceremonial robe.
4. Ecclesiastical.
   1. one of the garments worn by the clergy and their assistants, choristers, etc., during divine service and on other occasions.
   2. one of the garments worn by the celebrant, deacon, and subdeacon during the celebration of the Eucharist.
5. something that clothes or covers like a garment: a mountaintop with a vestment of clouds.

noun

1. a garment or robe, esp one denoting office, authority, or rank
2. any of various ceremonial garments worn by the clergy at religious services